unprincipled
UK: ʌnˈprɪnsɪpld | US: ʌnˈprɪnsəpld
adj. lacking moral principles; unscrupulous
adj. not guided by or based on ethical rules
The word "unprincipled" combines the negative prefix "un-" (Old English "un-," meaning "not") with "principle" (from Latin "principium," meaning "beginning, foundation, rule") and the adjectival suffix "-ed." The term evolved in English to describe someone who acts without adherence to moral or ethical guidelines, emphasizing the absence ("un-") of foundational ("principle") values. The suffix "-ed" turns the noun into an adjective, solidifying its descriptive function.
The politician was accused of being unprincipled after repeatedly changing his stance for personal gain.
An unprincipled businessman might exploit loopholes to avoid taxes.
Her unprincipled behavior shocked her colleagues, who expected integrity.
The novel’s villain is cunning and unprincipled, willing to betray anyone.
Leaders who are unprincipled often lose public trust over time.